Precanceled stamps are special stamps that come in small denominations and are specifically for Presorted First-Class Mail and Standard Mail mailings. Mailers apply these special stamps to envelopes at a lower postage price (say, 15 cents) and pay the difference when they drop off the mail at the Post Office. The business mail entry unit clerk can help you fill out your postage statement to calculate how much you still owe. You can pay that difference with a check, a meter strip, or through a postage account.

Precanceled stamps are available in various non-denominations in coils of 500, 3,000, and 10,000 for the following classes of mail: